Split pulley



(No Model.)

W. P. MAISH. SPLIT PULLEY.

N0. 426,292. Patented Apr. 22, 1890.

'Nrrn STATES ATENT ()FFICE.

lVILBUR F. MAISII, OF \VARSAV, INDIANA.

SPLIT PU LLEY.

SPECIFICATION forming part of Letters Patent No. 426,292, dated April22, 1890.

Application filed November 19, 1889. Serial No. 330,869. (No model.)

To all whom it may concern:

Be it known that I, IVILBUR F. MAISH, a citizen of the United States,residing at lVarsaw, in the county of Kosciusko and State of Indiana,have invented certain new and useful. Improvements in a Split-BandPulley, of which the following is afull, clear, and exact description,that will enable others to make and use the same, refer ence being hadto the accompanying drawings, forming a part of this specification.

This invention relates to improvements in split pulleys; and it consistsof certain novel features in the construction, combination, andarrangement of the different parts, as will be hereinafter set forth.

Figure 1 is a side elevation of a pulley embodying my improved features;Fig. 2, a transverse section in plane 2, Fig. 1, looking in thedirection indicated by the arrow; Fig. 3, a diametrical section in plane3, Fi 2 and Fig. 4., a detached end view of the separable or splitsleeve.

Referring to the drawings, A represents the rim of the pulley, B thehub, C the arms on one side, and D the companion bracing-arms located onthe opposite side of the hub. The rim consists of a number of sectionsa, laid up in the usual manner and secured together by means of someadhesive composition and the dowel-pins a. The rim is in two parts a aunited 011 the line a, and secured together by the angle-plates h andthe bolts 19, passing through the same.

The hub B consists of the two rectangular members at d, looselyinclosing the separable sleeve E and secured together by a number ofclamping-bolts F, arranged relatively as shown.

The continuous bracing-arms O D are each composed of a thin strip ofsteel rectangular in cross-section, the central parts 9 of which lieflat against the respective sides of the hub members, as illustrated inFigs. 1 and 3, and are rigidly secured thereto by the clampingbolts F,passing through the same. At the point where the arm part proper leavesthe hub they are given a twist, as at g, so as to present their thinedges in the direction of the axis of motion, and leaving the spacebetween the arms, as shown in Fig. 2, therebyoffering less resistance tothe atmosphere, and consequently making a lighter-running pulley. Thearm is also stronger, as the strain is cdgewise instead of fiatwise,thus allowing the use of a lighter arm. The part of the arms extendsfrom the hub to the rim at an oblique angle with reference to the axis.

The arms 0 D gradually diverge from the hub outwardly, so that theterminal ends mortised in the rim are wide apart, thus embracing more ofthe circumferential surface than if they were straight, and also havingbetter bracing qualities and aifording greater strength to thestructure. The ends of the arms inserted in the rim are secured in placeby the screws 9 The sleeve E is divided longitudinally on a diagonalline 72 with reference to the center of axis, so as to provide thebeveled edges h h (see Fig. 4) for the purpose of imparting a wedge-likeaction when the pul-- ley is clamped on the shaft, a little space 7L2being left between the adjacent faces of the hub members to facilitatethe clamping and wedging feature.

Having thus described my invention, what I claim as new, and desire tosecure by Let ters Patent, is-

1. The combination, in a split pulley, of the continuous bracing-arms,each consisting of a thin strip of metal having the central fiat partrigidly secured to the hub and the arm parts twisted to bring the edgeparts at right angles thereto and diverging at an oblique angle withreference to each other, and having the terminal ends permanently fixedin the rim, substantially as described.

2. The combination, in a split pulley, of the rim, the hub members, thecontinuous twisted bracing-arms, the fiat central parts whereof arerigidly secured to opposite sides of the hub members, the arm partextending at an oblique angle therefrom and terminating in the rim, andthe clamping-bolts passing through the arms and hub, substantially asdescribed.

3. The combination, in a split pulley, of

the rim, the continuous twisted bracing-arms, the hub members, the splitsleeve divided in a diagonal plane with reference to the axis, and theclamping-bolts passing through said arms and hub members, substantiallyas described.

4. The combination, in a split pulley, of

a separable sleeve divided in a diagonal plane with reference to theaxis of motion, substan- 1o tially as described.

\VILBUR F. MAISH,

lVitnesses:

L. M. FREEMAN, L. B. COUPLAND.

